JPH05289171A - Film unit with lens for multiplet-lens stereoscopic photography - Google Patents

Abstract

PURPOSE:To keep cost from rising by simplifying the mechanism of a camera and making use of space, to reduce the cost by facilitating the attachment of a photographing lens, and to easily, surely, readily and inexpensively perform the photographing of the image of the stereoscopic photography in, a lenticular system without making the unit so large. CONSTITUTION:The sensitivity of loaded film is >=ISO400, the F number of the lens is >=9.5, the lens is a single lens, which has fixed focus and is attached without adjusting flange back, and synthetic dispersion obtained by adding the dispersion of the flange focus of the lens and the dispersion of the flange back of the camera is set to <=1/2 of the depth of focus of the lens at the time of setting the size of a permissible circle of confusion at epsilon0.05mm, and each lens corresponding to the image frame of film is molded as one integral molded lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-lens type stereoscopic photographic lens having an exposure and film winding function and capable of immediately performing lenticular stereoscopic photography on a pre-loaded unexposed film. Attached film unit.

[0002]

2. Description of the Related Art A film unit with a lens is a so-called film-integrated camera having a function of taking a picture, which is also called a "shooting-only camera". It is used only for film shooting, and the camera body is generally apt to be discarded after taking out the exposed film. Therefore, it is manufactured at a low cost with a simple structure.

In order to make a three-dimensional photograph, a lenticular system is generally called a lenticular lens, and thin lenticular lenses are arranged side by side on a photographic print so that a plurality of photographs with parallax can be seen little by little. Is made to be able to see. By looking at a plurality of photographs with a little parallax, it is possible to see a three-dimensional photograph with a natural three-dimensional effect that gradually changes depending on the viewing direction.

Most conventional cameras capable of performing lenticular stereoscopic photography are so-called lens shutter camera systems that use 35 mm film (J135). Therefore, the film can be arbitrarily selected by the user. Was completed.

The film winding, rewinding, exposure to the film, taking lens, focusing and the like are performed manually or automatically like the lens shutter camera, and the structure is also adopted in the lens shutter camera. The structure that had been used was almost followed.

Further, since the lenticular method is a three-dimensional photograph, there are three or more photographed frames for each photographing. Therefore, even if the screen size is a half size, it is horizontally long and becomes a large body compared to a normal lens shutter camera. In addition, it cannot be said that it is lightweight from the above-mentioned structure.

[0007]

As described above, in the conventional camera for performing lenticular type stereoscopic photography, the mechanism such as film winding, rewinding, exposure to film, taking lens and focusing is manually operated. Regardless of whether it is an automatic system or not, the structure is complicated because it almost follows the mechanism of the lens shutter camera, and therefore the cost is also high, and the size and weight have to be increased. ..

Particularly, since it is a lenticular type multi-lens type stereoscopic camera, there are three or more photographic frames as described above. Therefore, each photographic lens corresponding to each photographic frame is mounted on the camera. It is necessary to adjust the flange back, which is the length from the lens mounting surface of the camera to the film image, for each shooting frame individually by the flange focus, which is the length from the surface to the focus surface, which causes the cost to rise. It was also

[0009] Therefore, the marketability is not widened due to the fact that it is a special camera for taking stereoscopic pictures of the lenticular system, mass production system cannot be set up, and therefore it cannot be obtained unless it goes to an excessively large camera store. Therefore, even if the user tries to take a lenticular type stereoscopic picture, it is difficult to obtain a camera, and the price of the camera is expensive, so it is not possible to take a stereoscopic picture easily.

As a result of solving these problems and improving the present invention, as a result of the simplification of the camera mechanism and the utilization of space, it is possible to suppress an increase in cost, and in particular, it is possible to easily attach the taking lens. The objective is to provide a film unit with a lens for multi-lens stereoscopic photography, which enables easy, reliable, and inexpensive lenticular stereoscopic photography without being too large. is there.

[0011]

Means for Solving the Problems The above-described object is to mount each film screen on a film screen of a plurality of adjoining frames which are preliminarily loaded with a film and are arranged in the film feeding direction, by means of respective lenses corresponding to the film screens. In the film unit with a lens for multi-view stereoscopic photography, the image for making a three-dimensional photograph is photographed on top, and the film that has been photographed by the winding operation of the film winding knob is sequentially rewound into the patrone. The sensitivity of the loaded film is IS
O400 or more, the F number of the lens is 9.5 or more, the lens is a single lens, fixed focus, without flange back adjustment mounting, and the flange focus variation of the lens and the flange back variation of the lens-equipped film unit are combined. The total variation is 0.05 mm in the size of the permissible circle of confusion.
In this case, the depth of focus of the lens is ½ or less, and the film unit with a lens for multi-view stereoscopic photography is achieved.

Further, the above-mentioned object is that a film is preliminarily loaded and a three-dimensional photograph is formed on each film screen by each lens corresponding to each film screen on a plurality of adjacent film screens lined up in the film feeding direction. In the film unit with multi-lens type lens for stereoscopic photography, the image for shooting is taken, and the film finished shooting by film winding knob operation is compatible with the film screen. Each of the lenses described above is molded as one integrally formed lens, which is achieved by a film unit with a lens for multi-view stereoscopic photography.

[0013]

FIG. 1 shows the appearance of one embodiment of a film unit with a lens for multi-view stereoscopic photography (hereinafter also referred to as the present camera) of the present invention. In this embodiment, three photographing lenses are used. The case of a film unit with a lens for three-dimensional stereoscopic photography is shown.

35mm film (J135) is pre-installed on this camera.
The film that has already been taken is taken into the patrone with the shooting, and after the shooting is finished, the film that has entered the patrone is sent to the photo lab without being rewound. The cartridge is taken out from the camera, the film is developed, the image is printed on the photosensitive material with the lenticular lens attached, using a special printer for creating stereoscopic pictures, and printed, and the prints are viewed immediately as stereoscopic pictures. You can

The unexposed film used in this camera is loaded by the loading method described later. In the loaded state, the film is wound from the cartridge to the spool.
It is designed to be rolled up in the Patrone each time it is taken. Therefore, in the photo lab, the photographed film can be taken out from the camera in the bright room.

In the camera of this embodiment, taking out of the photographed film takes into consideration the reuse of the camera. Therefore, it is necessary to prevent the user from exchanging the film without keeping the quality. It can be easily done only by bending a part of the lid, so it can be reused by checking the camera part, loading a new unexposed film and replacing the back lid on the manufacturer side. ..

Particularly, in this embodiment, the cartridge loaded in the camera is a commonly used cartridge (JISK).
7528) can be designed and manufactured, or can be designed and manufactured so as to use a cartridge having a thin outer diameter different from the cartridge generally used.

In the case of a cartridge having a small outer diameter, for example, a cartridge having an outer diameter of φ20.6 mm, the thickness of the camera can be suppressed to about 24 mm except for the lens barrel portion having the taking lens. It is possible to realize an ultra-thin compact camera.

The present camera is provided with a cardboard carton (paper cover) on which a product name, a simple usage method and the like are displayed, on a part of its outer surface.

FIG. 2 is a development view showing the structure of the present camera.

Reference numerals 10, 20 and 30 denote a camera body, a front cover and a back lid, which are main components of the camera, 40 is a strobe unit which is a built-in strobe light emitting device, and 50, 60 and 70 are These are the film winding mechanism, the shutter charge mechanism, and the film counter mechanism.

When the camera body 10 is used alone, each member constituting the film winding mechanism 50, the shutter charge mechanism 60, and the film counter mechanism 70 is mounted, and the shutter case 11 for accommodating the shutter blades is mounted.

The shutter case 11 is fixed by engaging the claws 11A projecting on both sides with the engaging portion 10A on the front surface of the camera body 10, and the shutter blades are linked to the shutter charge mechanism 60.

Further, in the lens mounting concave portion on the front surface of the shutter case 11, a single lens having a focal length f = 30 mm is used.
The lens 12A for photography with the number F _NO = 9.5, the integrally molded lens 12 that is integrally molded with 3 pieces is dropped into the guide pin.
It is covered by a lens retainer 13 having a slit 13A engaging with 11B.

The camera body 10 and the shutter case 11 described above
Are molded from a black matte plastic material having some elasticity, including the front cover 20 and the back cover 30 described above.

On the other hand, the strobe unit 40 is mounted and supported with reference to the guide pins 10B on the front surface of the camera body 10 and the holes 40A and 40B on the substrate which engage with one guide pin (not shown), respectively.

In the strobe unit 40, the upper and lower battery contact pieces 41 which are integrated with each other are inserted into the upper and lower slit holes 10D of the camera body 10 and projected into the battery chamber on the rear surface of the camera body 10 to form an AA battery as a strobe charging power source. Hold a certain battery power source E.

The integrated main capacitor C is stored in a capacitor chamber formed under the shutter case 11.

The lens retainer 13 and the strobe unit 40 described above
The fixing and integration of the above with the camera body 10 is completed by mounting the front cover 20 on the camera body 10.

Prior to mounting the front cover 20 on the camera body 10, a decorative cover 22 is fixed to the front surface of the front cover 20 in advance.
The makeup cover 22 has a guide pin 22A and four nails 22 on the back.
B are projected, and each is a hole 20A on the front of the front cover 20.
And 4 are engaged and attached to the locking portions 20B.

The front cover 20 is provided with a hole 20C, a claw 20D and three engaging portions 20E on the back surface, and each of them is attached to a guide pin 10E, a nail 10F and a side engaging portion 10G on the entire surface of the camera body 10. It is fitted and attached.

By mounting the front cover 20 on the camera body 10, the lens retainer 13 and the strobe unit 40 are fixed to the camera body 10.

The camera body 10 with the front cover 20 attached
In the cartridge chamber and the scroll chamber (both not shown) formed on the back surface of the cartridge, the cartridge P1 and the spool S2 with the leading end of the unexposed film F locked are respectively loaded.

The other end of the film F is locked to the spool S1 in the cartridge P1. Even if the film in the cartridge is wound up by the spool S2 after the film is loaded, the other end is locked to the spool S1. Therefore, it can be rolled up in the Patrone P1 every time the shooting is completed.

A back cover 30 is attached to the back surface of the camera body 10 in which the film F is loaded, and the regulation of the position of the film F on the light-shielding focus surface is maintained.

The back cover 30 is provided with claws 30A and 30B on the front surface thereof and locking holes 30C and 30D on the side surfaces thereof.
Claws 30A and 30B are engaged with the camera body 10 when mounted on the camera.
Holes 30C and 30D and one hole (not shown) are fixed to 10H and 10J by engaging with nails 10K and 10L of the camera body 10 and one nail (not shown).

After the back cover 30 is mounted, a predetermined film winding operation is performed to set a photographable screen, and the carton shown in FIG. 1 is mounted to complete the process.

Next, details of the film winding mechanism 50, the shutter charge mechanism 60, and the film counter mechanism 70 will be described.

FIG. 3 shows each of the above-mentioned mechanisms at an angle when viewed from the rear side of the camera, and FIG. 4 shows at an angle when viewed from the side of inserting the film-wrapped cartridge and spool into the camera body. It is a thing.

In the camera body 10, for film winding in the same plane on both sides with three screen frames 16 of half size (17 × 24 mm) adjacent to each other, which are exposure parts, aligned in the film feeding direction sandwiched therebetween. Further, a cartridge chamber 15A and a scroll chamber 15B are provided as two storage chambers for film loading, and the J135 film F wound in the cartridge P1 which is the storage container shown in FIG. 4 is loaded therein.

This camera is provided with three half-size screen frames arranged side by side in the film feeding direction adjacent to each other as described above, and is adapted to capture a lenticular stereoscopic photographic image.

In order to obtain a natural three-dimensional effect, it is preferable to take a lenticular type stereoscopic photographic image on a large number of adjacent side-by-side horizontal (film feed direction) screens, but the number of screens is large. Obviously, the lateral size of the camera becomes large. That is, the camera becomes large. Therefore, in the case of a camera for taking a stereoscopic photographic image of a normal lenticular system, a three-screen system or a four-screen system is adopted.

When a 35 mm film (J135) is used, the size of the screen frame in order to prevent problems at the photo lab is the so-called full size (24 × 36 mm) screen and half size (17 mm). X 24 mm) screen. And, of course, if you choose the full-size screen size, the lateral size of the camera will naturally increase. Therefore, in order to make the camera compact, the present inventors chose a half size screen size.

In the present embodiment, therefore, the film unit with a lens having a half size and three screens as described above, that is, a lens-equipped film unit for three-lens stereoscopic photography has been described. It is also possible to use a film unit with a lens for multi-view stereoscopic photography, which has a size and a screen frame number of 4 or more. In this camera, the back cover opening / closing structure provided in a normal camera is greatly simplified to reduce the size and cost of the camera.

That is, the hinge portion and the tightening claw portion of the back lid opening and closing structure provided in a normal camera are omitted, and the equivalent to the hinge portion is used only once when taking out the patrone after photographing. A groove 32 is provided in the back cover 30 shown in FIG. 2 for bending and taking out, and as the one corresponding to the tightening claw portion, the claws 10K and 10L of the camera body 10 and the back cover are described above.
The claws 30A and 30B of 30 are engaged with the holes 30C and 30D of the back cover 30 and the locking portions 10H and 10J of the camera body 10, so that the back cover 30 becomes the camera body.
It is designed to be fixed at 10.

The film F used in this camera of this embodiment is a commonly used patrone (JISK7528), a roll film J135 as in a general camera, and a patrone having an outer diameter of 20.6 mm. J135 film and roll film with a slightly thin total thickness of 130-140 μm
The cartridge is used as a storage container in advance in a dark room or the like, and the end thereof is fixed to the spool S1 of the cartridge P1 so that a predetermined number of frames can be photographed and the film is taken out from the film outlet of the cartridge P1 for a certain length. It is in a state. The film in this state will be loaded into the camera. The loading method will be described below.

As shown in FIG. 3, the cartridge is loaded in the cartridge chamber 15A so that the spool S1 (shown in FIG. 4) of the cartridge P1 is engaged with the fork 52 of the hoisting fork 52. On the other hand, the spool S2 is also inserted in the scroll chamber 15B. Then, in this embodiment, the film F is pulled out until the tip of the film notch FN of the film F is aligned with the index 17A on the lower portion of the lower rail surface, and the tip of the film F is inserted into the slit SL of the spool S2 so that the film F The perforation P is locked to the claw H. The film notch FN is designed to indicate the emulsion lot number of the film by means of several holes provided in the tongue portion at the tip of the film.

Next, the back cover 30 is covered and the cover is made light-tight.
Then, this camera in this state is attached to the film winding device, and the entire film F (with the other end not separated from the spool S1 of the cartridge P1) is moved to the scroll chamber 15B.
The film is loaded by winding the film on the spool S2. That is, by loading the film F in this manner, the film F is sequentially wound into the patrone P1 for each shooting, and after a predetermined number of shootings are completed, in this embodiment, two films, that is, 6 frames are taken. When the blank feed is performed, the leading end of the film F is not caught in the cartridge, and the filmed portion of the photographed film is completely caught in the cartridge P1 with a necessary length left. Therefore, this cartridge can be taken out from this camera in a bright room.

Next, the mechanism of the main body will be described with reference to FIG.

The camera body 10 has a film winding mechanism 50 including a photographing lens, a shutter charging mechanism 60,
The main mechanism of the film counter mechanism 70 is incorporated therein.

First, the film winding mechanism and the shutter charging mechanism will be described.

Reference numeral 51 is a film winding knob, and the film F loaded as described above is wound by rotating the film winding knob 51 counterclockwise.

In this embodiment, the number of teeth of the sprocket gear of the feeding means for feeding the film is the same as the number of perforations of the photographing frame group fed for each photographing. It has become. In other words, in this camera, half-size 3 screen frames
Since the camera has 16, the sprocket gear 54 has 1
It uses a sprocket gear with 12 teeth, which is the same as the number of perforations in the shooting frame group sent for each shooting. Therefore, a cam 55 coaxial with the 12-tooth sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B in the lower portion.
Is designed to rotate exactly once counterclockwise by winding the film.

That is, the film is wound up by taking the length of 12 perforations, which is the number of teeth of the sprocket gear, as the length for one photographing. As described above, the structure in which the sprocket gear of the film feeding means makes one rotation for each photographing is
The shutter charge mechanism, the film counter mechanism and the like can be made into a simple structure, which is very effective for cost reduction.

As the cam 55 rotates counterclockwise, the fan-shaped cam portion 55B naturally rotates counterclockwise as described above. In the process, the fan-shaped cam portion 55B moves the charge lever 61 and the charge lever shaft 63. Is rotated clockwise against the spring force of the charge lever spring 64 that urges the charge lever 61 in the counterclockwise direction, and the triangular ketobashi 61C provided on the charge lever 61 causes the rising portion 65 of the shutter lever 65 to rise.
When B is pressed, the rising portion 65B is overcome and the shutter charge mechanism is charged as shown in the figure.

Pin 65C of the shutter lever 65 and the camera body
The shutter spring 67 is stretched between the pins 18C provided on the pin 10. The pin 18B provided on the camera body 10 that guides the elongated hole of the shutter lever 65 slidably and rotatably by the pulling force of the shutter spring 67. The left end of the elongated hole is brought into contact with the arm plate 65D provided on the shutter lever 65 and the pin 18E provided on the camera body 10. Also the camera body
A shutter drive pin 65A for operating a shutter drive lever 66A pivotally supported by a pin 18D provided on the pin 10 is inserted into the forked portion of the shutter drive lever 66A. Then, at a pin 66B at the lower end on the opposite side of the shutter drive lever 66A, the shutter drive lever 66A engages with a shutter blade 66 guided so as to be slidable in the left-right direction.

As will be described later, the cam stopper after shooting is completed.
The projecting portion 62D of 62 is removed from the groove portion 55A of the cam 55,
The arm portion 57A of the hoisting stopper 57 changes from the state shown in the drawing to change the arm portion 61A of the charge lever 61 and the arm portion of the cam stopper 62.
The arm 62A is in contact with the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 which is displaced from each edge of the arm 62A and urges clockwise. When the cam 55 rotates exactly once as described above by the film winding and the groove 55A of the cam 55 returns to the initial position, the spring force that biases the cam stopper 62 in the clockwise direction by the horizontal end portion of the charge lever spring 64. As a result, the protrusion 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the lock of the arm portion 57A of the hoisting stopper 57, which was locked at the end surface of the arm portion 62A of the cam stopper 62 at this time, is released.

The outer peripheral cylindrical surface of the film winding knob 51 is a ratchet gear, and the V-shaped projection at the tip of the winding stopper 57 is released by the release of the lock, and the spring force of the winding stopper spring 58 causes the ratchet to rotate. It jumps into the tooth groove of the gear 51A and prevents the film winding knob 51 from rotating in the counterclockwise direction. That is, when the film winding is completed, the film winding knob 51 is prevented from further rotating.

Further, in the camera body 10, the tip of the reverse rotation preventing claw 53 utilizing the elasticity of the resin material is pressed against the ratchet gear 51A so as to prevent the film winding knob 51 from rotating in the opposite winding direction. It has become.

By pressing the release button 25 of the front cover 20, the release button pin 25A is planted on the back surface of the release button 25.
Operates in the direction of arrow A. That is, the front cover 20
When attached to the camera body 10, the winding knob
51 By the operation of the tip of the release button pin 25A in the direction of arrow A described above, the hoisting stopper 57 rotates counterclockwise against the spring force of the hoisting stopper spring 58. Then, from the end surface of the arm portion 57A of the hoisting stopper 57, the arm portion of the charge lever 61
The edge of 61A is disengaged, and the charge lever 61, and thus the cam stopper 62, is rotated counterclockwise by the spring force of the charge lever spring 64.

The counterclockwise rotation of the charge lever 61 due to the spring force of the charge lever spring 64, which is stronger than the shutter spring 67, causes the charge lever 61 to move to the above-mentioned range.
61C hits the rising portion 65B of the shutter lever 65, and then comes off the rising portion 65B. Therefore, the shutter lever 65
Rotates clockwise around the pin 18B in the long groove of the shutter lever against the tensile force of the shutter spring 67, and then returns to its original state by the tensile force of the shutter spring 67. Therefore, the shutter drive pin 65A rotates the shutter drive lever 66A about the pin 18D, and the pin 66B at the lower end of the shutter drive lever 66A.
As described above, the shutter blade 66 engaged with is slid to the left and right, and the square holes provided in the shutter blade 66 simultaneously expose three films on each film of the three screen frames 16 and then close the film. Become.

On the other hand, the cam stopper 62 also rotates counterclockwise together with the charge lever 61 as described above,
The protruding portion 62D of 62 is removed from the groove portion 55A of the cam 55. Therefore, even if you stop pressing the release button, the winding stopper
The arm portion 57A of 57 is biased in the clockwise direction by the spring force of the hoisting stopper spring 58, but the arm portion 61A of the charge lever 61.
Is stopped by the end face of the
The shaped protrusion does not lock the ratchet gear 51A of the winding knob 51. Therefore, the next film winding can be performed.

Next, the film counter mechanism will be described.

As described above, 72 meshes with the V groove 56A provided at the upper end of the cam shaft 56 which is planted in the cam 55 which rotates integrally with the sprocket gear 54, so that one film of film, namely, three frames is formed. It is an exponential gear that rotates clockwise by one tooth each time the cam shaft 56 is wound up and rotated once.

An index board 71 is printed on the upper surface of the index board gear 72 as an integrally molded product, and the number of remaining filmable images is displayed through the film counter window 26 on the upper surface of the front cover 20.

A projecting portion 72A is provided on the lower surface of the exponential gear 72, and the projecting portion 72A is projected by the next film winding after the predetermined number of photographing is completed.
It is designed to be inserted between the E and another protruding portion 62E of the cam stopper 62 so as to enter. Then, the projecting portion 72A is replaced by the two projecting portions 61.
By entering between E and 62E, the film is wound up for one shot, and even if the cam 55 makes one rotation and charging of the shutter is completed, both of the projecting portions 61E and 62E become the projecting portion 72A of the exponential gear 72. Since the movement is blocked, the charge lever 61 cannot operate and the protruding portion 62D of the cam stopper 62 cannot jump into the groove portion 55A of the cam 55. The arm portion 57A of the hoisting stopper 57 contacts the end surface of the arm portion 62A of the cam stopper 62 by the spring force of the hoisting stopper spring 58, and the V-shaped projection at the tip of the hoisting stopper 57 locks the ratchet gear 51A. Also, it is impossible to expose the film by operating the charge lever 61 to open and close the shutter blades.

As described above, in this embodiment, when the film is fed for two shots in an idle manner, the index plate gear 72 rotates by two teeth, and this rotation causes the protruding portion 72A of the index plate gear 72 to move. Although the protrusion 61E is pressed to prevent the charge lever 61 from moving, the cam stopper 62 is detached from another protrusion 62E. Therefore the protrusion
62D jumps into the groove 55A of the cam 55, and the winding stopper 57 is disengaged, so that the winding stopper 51 locks the winding knob 51, so that the film cannot be wound. Further, as described above, the movement of the charge lever 61 is blocked so that the film cannot be exposed. In this way, the tongue at the leading edge of the film is prevented from being caught in the cartridge and the tongue of the required length is secured. Therefore, in order to make the camera compact, even if a cartridge having a small outer diameter is used, there is no problem in pulling out the film from the cartridge at the time of development.

Next, the sensitivity of the film loaded in the camera, the lens, and the mounting of the lens will be described.

This camera is loaded with a film having a film sensitivity of ISO400, and as described with reference to FIG. 2, a photographing lens 12 having an F number F _NO = 9.5 at each focal length f = 30 mm.
An integrally molded lens 12 in which A and 3 pieces are integrally molded is attached.

Normally, when photographing a person in fine weather, an exposure of 16 EV values (exposure value) is appropriate when using ISO400 film. When the subject is photographed with this camera, the shutter speed of this camera is 1/80 second for the reason described below, so the EV value (exposure value) is 12.8 in this camera using a lens with F _NO = 9.5. -12.8 = 3.2, that is, 3.2 step overexposure. However, the film loaded in this camera is a negative color film with a wide exposure latitude, an ISO400 film with a wider exposure latitude than the normal ISO100 film, and an overexposure that is easy to cover by printing. Since it is on the side, overexposure of more than 3 steps is not a problem, and overexposure of more than 5 steps is actually acceptable.
Therefore, the brighter subject can be photographed up to EV18 (ISO400).

Also, for a darker subject with an EV value (exposure value) of 12.8, it is possible to take an ISO400 film from EV10.8 (ISO400), assuming that the exposure can be covered up to two steps below the exposure latitude of the film. It is possible.

That is, to summarize the above, the brightness of the subject that can be photographed is EV using the ISO400 film.
EV with a brightness that gives a proper exposure value (exposure value) of 12.8
Focusing on 12.8 (ISO400), EV value (exposure value) of ISO400 film on brighter side is 5.2 steps at 12.8 EV18 (ISO400) of brightness that is overexposed
Up to 2 EV exposure (exposure value) of 12.8 in the darker subject EV10.8 (ISO40
It will be from 0).

Next, the shutter speed will be described.

As described above, this camera is equipped with the F9.5 taking lens. In addition, a strobe light emitting device is also attached to enable shooting in dark places.
However, due to the nature of this camera, a minimum strobe lighting device is incorporated in terms of cost. Therefore, it is considered that a fluorescent lamp, an incandescent lamp, etc. in the surroundings can be used as auxiliary light for about 1 EV when using a F9.5 lens for flash photography. For this purpose, the high-speed shutter cannot compensate for the insufficient amount of strobe light, and the shutter speed is just right, including the fact that about 1/80 second is the shutter speed at which camera shake is less likely to occur during daytime shooting.

That is, when shooting a subject at a distance of about 3 m with a flash, the guide number of the flash of this camera is I
Since it is 10 at SO100, the guide number will be 20 at ISO400, and since it is an F9.5 shooting lens, the appropriate shooting distance will be about 2 m, and at 3 m it will be about 1 step, about 1 EV under. Therefore, by using the surrounding fluorescent lamp or incandescent lamp as the auxiliary light depending on the shutter speed, the exposure becomes almost proper.

Thus, in this camera, the ISO40
By loading 0 film, and incorporating a F9.5 lens, a shutter speed of 1/80 seconds, and a strobe light emitting device, it is possible to take stereoscopic photographs from daytime fine weather to nighttime indoors.

Next, the lens of this camera and the mounting of the lens will be described.

In an ordinary single lens reflex camera using a 35 mm film, the size of the permissible circle of confusion is generally 0.033 to 0.035 mm.

In the present camera such as a film unit with a lens, the size of the permissible circle of confusion does not need to adopt the above value due to the nature of the camera.

That is, in the case of a normal camera, it is necessary to take into consideration the fact that it is stretched to more than four, but in the case of this camera, considering the cabinet size as the limit, the size of the permissible circle of confusion is as follows. ..

The four-section (254 × 305) and the cabinet (120 × 165) are compared by their diagonal lengths.

(254 ² +305 ² ) ^1/2 / (120 ² +165 ² ) ^1/2 = 1.95≈2 If this magnification is set a little smaller with a margin of 1.5, the size of the permissible circle of confusion is 0.033 × 1.5. = 0.0495 0.035 × 1.5 = 0.0525 From these values, the size of the permissible circle of confusion for the film unit with lens is set to 0.05.

In FIG. 5A, the best focus object distance S under the following conditions is calculated, and further the front depth of field a and the rear depth of field b are calculated.

A: (front depth of field) b: (rear depth of field) S: (best focus subject distance) a + b: (depth of field) = 5000 mm (5 m between a distance of about 1 m and about 6 m) Is the depth of field) ε ': (Size of permissible circle of confusion) = 0.05mm F: (F number of lens) = 9.5 f: (Focal length of lens) = 30mm Using the following equation, a + b = ^{2f 2 · ε '· F ·} S 2 / {f 4 - (ε' · F · S) 2} 5 × 10 3 = 2 × 30 2 × 0.05 × 9.5 × S 2/30 4 -0.05 × 9.5 × S ² S = 1429.07mm ≈ 1400mm = 1.4m Using the following formula, a = ε ′ · F · S ² / (f ² + ε ′ · F · S) a = 0.05 × 9.5 × 1429 ² / (30 ² +0. 05 × 9.5 × 1429) a = 614mm ≒ 600mm = 0.6m b = ε ′ ・ F ・ S ² / (f ² −ε ′ ・ F ・ S) b = 0.05 × 9.5 × 1429 ² / or a ^{(30 2 -0.05 × 9.5 × 1429} ) b = 4386mm ≒ 4400mm = 4.4m (a + b = 614 + 4386 = 5000mm = 5m) or Shown in Figure 6 is as Mel and below.

Best Focus Subject Distance S = 1.4 m Front Depth of Field = S−a = 1.4−0.6 = 0.8 m Rear Depth of Field = S + b = 1.4 + 4.4 = 5.8 m Depth of Field Depth = S + b− (S−a) = a + b = 0.6 + 4.4 =
5m Next, the dimension from the mounting surface Y of the lens to the camera to the focusing surface P, that is, the variation of the so-called flange focus FF and the focal depths δ ₁ and δ ₂ will be described with reference to FIGS.

In FIG. 5B, (δ ₁ + δ ₂ ) / ε ₂ ′ = δ ₁ / ε ′ ε ₂ ′ = ε ′ · (δ ₁ + δ ₂ ) / δ ₁ where δ ₁ ≈δ ₂ Then, ε ₂ ′ = 2ε ′ In FIG. 5C, (δ ₁ + δ ₂ ) / ε ₁ ′ = δ ₂ / ε ′ ε ₁ ′ = ε ′ · (δ ₁ + δ ₂ ) / δ ₂ where δ ₁ When ≈δ ₂ , ε ₁ ′ = 2ε ′ Therefore ε ₂ ′ = ε ₁ ′ = 2ε ′ From the above results, the flange focus FF is FF = FB−δ
Between _{2 ~FF} = FB + _{δ 1,} i.e. the magnitude epsilon ₂ of ± [delta] ₁ or ± [delta] ₂ fluctuates and confusion circle ', epsilon _1' indicates that doubles the size of the permissible circle of confusion epsilon '. Therefore, the variation amount of the flange focus FF in which the size of the circle of confusion is equal to or smaller than the size of the permissible circle of confusion ε'is as follows.

From FIG. 5A, δ ₁ ≈δ ₂ ≈F · ε ′ In FIG. 5B ′, (δ ₁ ′ + δ ₂ ′) / ε ₀ ′ = δ ₁ ′ / ε ″ ε ₀ ′ = Since ε ″ (δ ₁ ′ + δ ₂ ′) / δ ₁ ′ ε ₀ ′ ＝ ε ′, ε ′ = ε ″ (δ ₁ ′ + δ ₂ ′) / δ ₁ ′ δ ₁ ′ ≈δ ₂ ′ Then, ε ′ = 2ε ″, similarly in FIG. 5 (c ′), (δ ₁ ′ + δ ₂ ′) / ε ₀ ′ = δ ₂ ′ / ε ″ ε ₀ ′ = ε ″ (δ ₁ ′ + δ ₂ ′) / Since δ ₂ ′ ε ₀ ′ = ε ′, ε ′ = ε ″ (δ ₁ ′ + δ ₂ ′) / δ ₂ ′ δ ₁ ′ ≈δ ₂ ′, ε ′ = 2ε ″ _{1 ≒ δ 2 ≒ F · ε} ' since it is _{δ 1 = δ 2 = F ·} 2ε " Therefore _{Fε" = δ 1/2 =} δ 2/2 = δ 1' = δ 2 ' That is, the size of the circle of confusion Is less than or equal to the size of the permissible circle of confusion ε ′, the variation amount δ ₁ ′ of the flange focus FF,
δ ₂ ′ should be set to 1/2 or less of the depth of focus δ ₁ , δ ₂ .

The following is an actual calculation by inserting numerical values.

[0089] δ ₁ = δ ₂ = 'because it is _{δ 1 = δ 2 = 9.5 ×} 0.05 = 0.475 ≒ 0.5 Therefore _{δ 1' F · ε = δ} 2 '= δ 1/2 = δ 2 /2=0.5/ 2 = 0.25 The numerical value of 0.25 mm, which is 1/2 of the depth of focus of this lens, is a lens whose flange focus FF variation is ± 0.25 mm or less. An image with depth of field due to will fall within the depth of focus of this lens. Although the depth of field does not change, it is inevitable that the front depth of field position and the rear depth of field position slightly change due to variations in flange focus.

Further, in order to make the calculation easy to understand, the variation of the lens position is explained only by the variation of the lens flange focus FF, but the actual variation of the lens position is the variation of the lens flange focus and the lens of this camera. It is necessary to consider the dimensional variation from the mounting surface of the camera to the rail surface, which is the film surface, that is, the combined variation that matches the variation of the flange back of this camera. Therefore, if the total variation is 1/2 or less of the depth of focus of the lens when the size of the permissible circle of confusion is 0.05 mm, the image of the depth of field by this lens is It will be within the depth of focus of the lens.

From the calculation result according to the present embodiment, it was found that the lens can be mounted without adjustment if the above-mentioned variation in integration is ± 0.25 mm or less. Therefore, in order to mount the lens without adjustment, the combined variation of the lens flange focus variation, which is the combined variation, and the flange back variation, which is the dimension from the lens mounting surface to the rail surface of this camera, should be ± 0.25. It will be necessary to keep it within mm. In terms of a resin molding die, this suppresses variations in the flange focus dimension, which is the dimension from the lens mounting surface of the lens to the camera to the focus surface. Similarly, with a resin molding die (see FIG. 2), dimensional variation from the lens mounting surface of the molding die of the shutter case 11 to the contact surface of the intermediate member inside the shutter case is suppressed.

The resin molding die suppresses dimensional variation from the contact surface of the intermediate member to the shutter case 11 to the contact surface of the camera body 10. And with a resin mold,
The dimensional variation from the contact surface of the camera body 10 to the intermediate member by the molding die to the rail surface is suppressed. That is, it is possible to suppress the above-mentioned dimensional variations and to suppress the total variation to within ± 0.25 mm. For this purpose, it is necessary to suppress 0.25 / 4≈0.06 on average, that is, the variation in the above dimensions of each mold is controlled to ± 0.06 or less. However, it is not difficult with the current technology to suppress the variation in the above dimensions to ± 0.06 or less.

Next, in this embodiment, in order to reduce the variation in the flange focus of the lenses among the above-mentioned variations in integration, the three lenses are integrally formed as described above to form an integrally formed lens. 7 (a) and 7 (b) show a plan view of the integrally molded lens and FIG.
In the -X sectional view, 12A shows the individual photographing lenses in the integrally molded lens 12.

By molding each lens as an integrally molded lens in this way, it is possible to reduce the variation between the lenses in the integrally molded lens, and thus it is possible to reduce the variation between the lenses for each molding. Become.

[0095]

According to the present invention, the cost increase is suppressed by simplifying the mechanism of the camera and utilizing the space, and in particular, the photographing lens can be mounted without adjustment, which reduces the cost, and does not become so large. Therefore, a film unit with a multi-lens type stereoscopic photographic lens that can easily, reliably, and inexpensively take a lenticular stereoscopic photographic image has been provided.

[Brief description of drawings]

FIG. 1 is an external view of a film unit with a lens for three-lens stereoscopic photography according to an embodiment of the present invention.

FIG. 2 is a development view showing the configuration of a film unit with a lens for three-lens stereoscopic photography according to an embodiment of the present invention.

FIG. 3 is a perspective view of each mechanism such as a camera main body and a front cover of the film unit with a lens for three-dimensional stereoscopic photography according to one embodiment of the present invention, as viewed from the back side.

FIG. 4 is a perspective view of a film used in a film unit with a lens for three-lens stereoscopic photography according to an embodiment of the present invention.

FIG. 5 shows the relationship between the depth of focus and the circle of confusion due to the variation in the flange focus of the lens, and the variation in the flange focus when the size of the circle of confusion is less than or equal to the size of the permissible circle of confusion. (b) and (c) show the relationship between the depth of focus and the circle of confusion, and (b ') and (c') show the variation of the flange focus where the size of the circle of confusion is less than the size of the permissible circle of confusion. ..

FIG. 6 is a diagram showing calculation results of a subject distance, a depth of field, and the like by the lens of the embodiment according to the present invention.

7 (a) is a plan view and FIG. 7 (b) is a cross-sectional view taken along line XX of the integrally molded lens according to the present invention.

[Explanation of symbols]

12 Monolithic lens 12A Lens for photography ε ′ Size of permissible circle of confusion ε ₁ ′, ε ₂ ′ Size of circle of confusion δ ₁ , δ ₂ Depth of focus Y Lens mounting surface to camera P Focus surface FF Flange focus FB Flange back δ ₁ ′, δ ₂ ′ Flange focus allowable variation

Claims (2)

[Claims] 1. A method for making a three-dimensional photograph on each film screen by a lens corresponding to each film screen on a film screen of a plurality of adjacent frames which are preliminarily loaded with a film and are lined up in the film feeding direction. Take a picture,
In a film unit with a lens for multi-view stereoscopic photography, in which the film which has been photographed by the film winding knob is sequentially rewound into the cartridge, the sensitivity of the film to be loaded is ISO 400 or more, and the F of the lens is F.
The number is 9.5 or more, the lens is a single lens, fixed focus, flange back non-adjustable mounting, and the combined variation that combines the variation of the flange focus of the lens and the variation of the flange back of the lens-equipped film unit,
A film unit with a lens for multi-view stereoscopic photography, characterized in that when the size of the permissible circle of confusion is 0.05 mm, the depth of focus is 1/2 or less of the lens. 2. A method for making a three-dimensional photograph on each film screen by a lens corresponding to each film screen on a plurality of adjacent film screens which are preliminarily loaded with a film and which are lined up in the film feeding direction. Take a picture,
In the film unit with a lens for multi-view stereoscopic photography, in which the film which has been photographed by the film winding knob is successively rewound into the cartridge, one lens is used for each lens corresponding to the film screen. A film unit with a lens for multi-view stereoscopic photography, which is formed as an integrally formed lens.